Placebo pills?

Hannah
So my boyfriend and I began having sex a lot within the past month. I would say about 3 times a week it would happen and in our previous relationships we barley ever had sex. I'm on birth control and he always used a condom but they would often break so he would pull out put on a new one and continue, but he never finished inside of me. I'm on my 3rd day of placebo pills and my period has yet to come. I was really stressed over the course of this month and would wake up sweating so that may be it. What are the chances I could be pregnant?